Netdata: Streaming protocol chart slot guard off-by-one allows ~16 GiB allocation request, crashing parent agent (CVE-2026-83600) | HOL Guard CVE

Medium · CVSS 6.5CVE-2026-83600

Netdata: Streaming protocol chart slot guard off-by-one allows ~16 GiB allocation request, crashing parent agent

Answer in brief

CVE-2026-83600 records a Medium severity (CVSS 6.5) vulnerability in Netdata: Streaming protocol chart slot guard off-by-one allows ~16 GiB allocation request, crashing parent agent. The current sources do not mark it as known exploited. The current feed maps netdata/netdata (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 22, 2026Updated Sep 22, 2026Source checked Sep 22, 2026First seen by HOL Sep 22, 2026Material review Sep 22, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps netdata/netdata (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
netdata/netdatageneric	<2.10.4	2.10.4

Recommended response

Check inventory. Check lockfiles and deployed manifests for netdata/netdata.
Review the reported fix. Update netdata/netdata to 2.10.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 22, 2026

Sources and claim methodology

Upstream source description

Netdata is an open source observability tool. Prior to 2.10.4, an authenticated child agent can send an oversized CHART SLOT value that str2ull_encoded passes to pluginsd_rrdset_cache_put_to_slot in src/plugins.d/pluginsd_internals.h. The accepted slot drives reallocz to request an approximately 16 GiB chart-pointer array, and allocation failure invokes fatal and aborts the parent Netdata agent, repeatedly disabling centralized monitoring while stream access persists. This issue is fixed in version 2.10.4 and nightly build 2.10.0-782-nightly.

Quoted source text, attributed separately from HOL analysis.